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needhelpfastplease

  • 8 months ago

A student pushes a 40-N block across the floor for a distance of 10 m. How much work was applied to move the block? A. 4 J B. 40 J C. 400 J D. 4000 J

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  1. timaashorty
    • 8 months ago
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    I'm not 100% sure about this one but I would go with C.

  2. kym02
    • 8 months ago
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    I think it's also C because work=force x distance.

  3. theEric
    • 8 months ago
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    Right! Because the force and displacement are in the same exact direction, you can use that formula.

  4. needhelpfastplease
    • 8 months ago
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    thanks everyone! You all are very helpful!

  5. theEric
    • 8 months ago
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    :) You're welcome! More generally, \(\large W=F\dot\ d\dot\ \cos(\theta)\) where \(\theta\) is the angle between force and displacement. You can see that, when they're in the same direction, \(\theta=0\) \(\implies W=F\dot\ d\dot\ \cos(0)=F\dot\ d\dot\ 1=F\dot\ d\)

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